[ltp] ACPI & APM Confused

[Antiphon]

ACPI (Advanced Configuration and Power Interface) is a newer 
implementation of power management than APM (Advanced Power Management). 
It is only a couple of years old while APM has been around for a few years 
longer.

The Linux kernel has much better APM support than ACPI because many 
hardware manufacturers do not fully adhere to the ACPI specs. If your 
notebook supports APM, you will most likely be able to get everything to 
work under Linux. Many TPs support both specifications and you can choose 
which one you want to use.

HTH

On Sun, 29 Feb 2004 13:06:06 -0600, Daniel Jimenez <djimenez@pobox.com> 
wrote:

> Hi all,
>
> I'm confused. What exactly is the difference between ACPI and APM?
>
> I am currently using 2.6.2 with ACPI enabled and I am able to shutdown 
> my machine using shutdown -h now.
>
> I am unable to suspend my machine (to memory or to disk), or press the 
> power button and have it shut down.
>
> I am able to control my processor speed using cpufreqd and it works 
> great (I don't think that's related to ACPI or APM though).
>
> Thanks!,